Design of waveguide-fed series slot arrays

A Series Slot Array Antenna for 45$^{\circ}$-Inclined Linear Polarization With SIW Technology

“…As a result, it is hard to match the input impedance of a 45 -inclined series slot array antenna to the wave impedance of a given radiating SIW without any matching circuits. Therefore, the conventional WG-fed series slot array antenna presented in [4] with its impedance matching and bore sight main beam are infeasible with only 45 -inclined resonant radiating slots due to their high input impedances and out-of-phase slot mode voltages, respectively.…”

“…The inductive and capacitive self-impedances denoted by and that are normalized to the wave impedance of a given radiating SIW can be plotted in the complex plane with respect to the amplitude and phase. The phase of these inductive and capacitive self-impedances are then given by (4) Besides, the phase difference of the alternating reactance slot pair separated by a half guided wavelength can also be obtained by (5) The normalized self-impedances of an alternating reactance slot pair were chosen as and , respectively, based on the linearly interpolated slot impedance data. The phase difference of the mode voltages between these slots can be calculated using (4) and (5) with 19.07 .…”

“…The series slot array antennas also have been investigated and analyzed by Orefice and Elliott oriented parallel to the shunt slot array design procedure [4]. Both the shunt and series slot array elements are cut on the upper rectangular waveguide (RWG) broad wall with a slot spacing of one-half guided wavelength at the operating frequency.…”

“…It is difficult to generate an arbitrary polarization using fundamental shunt and series WG-fed slot array antennas, which generate only the vertical or horizontal LP. Furthermore, the element spacing of a guided wavelength is inevitable for the in-phase electric field distribution of 45 -inclined series slot array elements, which consist of the resonant slot length only [4]. As a result, the grating lobes can easily occur in the longitudinal direction of the radiating lines and the radiation efficiency will be decreased.…”

Design and Analysis of 45°-Inclined Linearly Polarized Substrate Integrated Waveguide(SIW) Slot Sub-Array Antenna for 35 GHz

“…, [2] . 급전부를 포함한 금속 도파관 슬 롯 배열 안테나는 3차원 구조체로서 큰 부피를 차지 하기 때문에 설치 공간의 확보가 어려울 뿐만 아니 라, 높은 제작 비용으로 대량 생산에 무리가 있고, 병 렬 및 직렬 슬롯만을 이용하는 기존의 슬롯 배열 안 테나로는 임의의 선형 편파를 발생시키기에는 한계 가 있다.…”